[llvm] [ARM] Remove unnecessary casts (NFC) (PR #148391)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/148391

getRegisterInfo() already returns const ARMBaseRegisterInfo *.

Likewise, getInstrInfo() already returns const ARMBaseInstrInfo *.


>From 3730e0197b45820ec424d9f52b9baac1e0f2cb9d Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 12 Jul 2025 11:37:31 -0700
Subject: [PATCH] [ARM] Remove unnecessary casts (NFC)

getRegisterInfo() already returns const ARMBaseRegisterInfo *.

Likewise, getInstrInfo() already returns const ARMBaseInstrInfo *.
---
 llvm/lib/Target/ARM/ARMFastISel.cpp         | 3 +--
 llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/ARM/ARMFastISel.cpp b/llvm/lib/Target/ARM/ARMFastISel.cpp
index 06499a3945ee5..edf68d3c9a715 100644
--- a/llvm/lib/Target/ARM/ARMFastISel.cpp
+++ b/llvm/lib/Target/ARM/ARMFastISel.cpp
@@ -2562,8 +2562,7 @@ bool ARMFastISel::SelectIntrinsicCall(const IntrinsicInst &I) {
     const TargetRegisterClass *RC = isThumb2 ? &ARM::tGPRRegClass
                                              : &ARM::GPRRegClass;
 
-    const ARMBaseRegisterInfo *RegInfo =
-        static_cast<const ARMBaseRegisterInfo *>(Subtarget->getRegisterInfo());
+    const ARMBaseRegisterInfo *RegInfo = Subtarget->getRegisterInfo();
     Register FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF));
     Register SrcReg = FramePtr;
 
diff --git a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
index 06f362b26744f..b84f685f214c7 100644
--- a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
+++ b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
@@ -1293,7 +1293,7 @@ bool ARMLowOverheadLoops::runOnMachineFunction(MachineFunction &mf) {
   RDA = &getAnalysis<ReachingDefAnalysis>();
   MF->getProperties().setTracksLiveness();
   MRI = &MF->getRegInfo();
-  TII = static_cast<const ARMBaseInstrInfo*>(ST.getInstrInfo());
+  TII = ST.getInstrInfo();
   TRI = ST.getRegisterInfo();
   BBUtils = std::make_unique<ARMBasicBlockUtils>(*MF);
   BBUtils->computeAllBlockSizes();